1#!/bin/sh
2#
3# unifdefall: remove all the #if's from a source file
4#
5# Copyright (c) 2002 - 2013 Tony Finch <dot@dotat.at>
6# Copyright (c) 2009 - 2010 Jonathan Nieder <jrnieder@gmail.com>
7#
8# Redistribution and use in source and binary forms, with or without
9# modification, are permitted provided that the following conditions
10# are met:
11# 1. Redistributions of source code must retain the above copyright
12#    notice, this list of conditions and the following disclaimer.
13# 2. Redistributions in binary form must reproduce the above copyright
14#    notice, this list of conditions and the following disclaimer in the
15#    documentation and/or other materials provided with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27# SUCH DAMAGE.
28#
29# $FreeBSD$
30
31set -e
32
33unifdef="$(dirname "$0")/unifdef"
34if [ ! -e "$unifdef" ]
35then
36	unifdef=unifdef
37fi
38
39case "$@" in
40"-d "*)	echo DEBUGGING 1>&2
41	debug=-d
42	shift
43esac
44
45tmp=$(mktemp -d "${TMPDIR:-/tmp}/${0##*/}.XXXXXXXXXX") || exit 2
46trap 'rm -r "$tmp" || exit 2' EXIT
47
48export LC_ALL=C
49
50# list of all controlling macros; assume these are undefined
51"$unifdef" $debug -s "$@" | sort -u | sed 's/^/#undef /' >"$tmp/undefs"
52# list of all macro definitions
53cc -E -dM "$@" | sort >"$tmp/defs"
54
55case $debug in
56-d)	cat "$tmp/undefs" "$tmp/defs" 1>&2
57esac
58
59# order of -f arguments means definitions override undefs
60"$unifdef" $debug -k -f "$tmp/undefs" -f "$tmp/defs" "$@"
61